Gage-movement.



F. G. BLANGH'ARD &' E; B. GROGKER. GAGE MOVEMENT. APPLICATION FILED JULYIB, 1910.

980,403. r Patented Ja11.3, 1911.

STATES PATENT OFFICE.

rnnnnarox c. ramnormnn AND manner a. cnocxnn, or samenron'r, CONNECTICUT,

ASSIGNOBS TO THE ASHCR OFT MANUFACTURING COMPANY, OF BBIDGEPORT, CON- NECTICUT, 'A. CORPOBATIONOF CONNECTICUT.

'eaion-uovnunnr.

useful Improvements in Gage-Movements,

of which the following is a specification.

Our invention relates to pressure or vacuum gages, and more particularly to the. movement employed in such gages to actuate;

the age or index hand.

eretofore 1n gages of this character the movement has been commonly constructed with a toothed sector which actuates a inion to which the index hand is attac ed. Gage movements of this construction have proved'unsatisfactory in use especially under conditions where there is either external mechanical vibration or-internal pressure vibration; for as the bearing surfaces between these'ctor and pinion are small, vibration causes a rapid-wearing of the gears resulting in progressively increasing inaccurac Moreover, movements of the segment i w an pinion type cannot well be made small enough for use in the small gages now comto eliminate t monly used on automobiles, steam turbines, etc., 'andin which the conditions as regards external and; internal vibration are very severe. Attem ts have heretofore been made lie objectionable features of movements of the se eat and pinion type by the substitution 0 levers for the segment and pinion. These lever movements here-j tofore provided while commercially more satisfactory than the' segment and pinion movements, have been constructed with comparatively hea-Ey parts and have considerable gravity e ect because of their unbalanced arrangement, the results being-that when used under conditions where there is either internal or external vibration they acquire considerable momentum and tend to rack themselves to i'eces.

It is the principa object of this invention to provide a simple gage movement which may be very economically manufactured, andwherein the moving parts are so light and well balanced as not to be injuriously afiected by vibration either internal or external.

Qther features of noveltyand improvement will be hereinafter described and particularly pointed out in the claims.

Specification of Letters Patent. Application filed July 13, 1910. Serial No. 571,710.

Patented Jan. 3, 1911.

Referring to thedrawings which illustrate embodiments of our invention,'-Figure 1 is a plan view of our improved gage the casing or jacket being partially broken away ;.Fig. 2 is a sectional view of the same;

Fig. 3 is a sectional view on line 3--3 Fig. 5; Fig. 4 is a sectional view on line 44 Fig. 5; Fig. 5 is a-sectional view on line 5-5 Fig. 1; Fig. 6. is a plan view of a modified form of our invention; and Fig. 7 is a sectional view of the same.

A- is the casing having a shoulder a into which is screwed the'arbor B which. carries the sleeve C and provides two lar cylindricalfibearin'gsb, b,'therefor. T e arbor B is cutaway between the bee s, b, b, and the sleeve C is slotted at c for t' e purpose presently to be described. D is the crank securedupon the sleeve 0; and E is a s 0- ing collar surrounding the arbor and the space between the arms of the crank The crank is preferably secured to the sleeve by slipping it over the lower end thereof and then spinning the sleeve over so that the crank is riveted and held in proper ro register with the'screw hole (1', and a screw hole f adapted to register with the slot d. A screw G passes through the slot f into the screw hole'd l-nd a crank screw H through the screw xhole f and the s ot d. Said crank screw H also secures one end of the link I the other'end being secured to a. flexible tip 7' on the actuatin member J, shown in the drawings as a ourdon tube spring. It will be clear that the slots f and d permit the-slide F to be-adjusted to give the proper throw to the crank, and that by reason of the'slojt' c in the sleeve (Land the cut away ortio'n of the arbor, the slide may be broug t. in very close to the arbor and adjusted so as to give a very short throw to the crank.

The index hand K, preferably made of aluminum for lightness, and embossed for stiffness, is secured to the top end of the sleeve 0 in the same manner that the gage crank is secured to the bottom end, and 1s spun thereon so that its proper position with asses relation to the other parts of the movement cannot be disturbed.

To provide for. variations in the position of the end of the actuating member J, there is provided a flexible tip 7' which can readily be bent by anysuitable tool into proper position to be secured to site end of the crank is connected to the actuating member by the link I. In this form of our invention the adjustable slide is dispensed with, and the desired throw of the crank is obtained by bending the crankv itself with any suitable tool.

Itis well known that a stop pin upon the face of the gage dial to hold the index hand at zero, is not only unsightly, "but also frequently causes the gage to ecome inaccurate and even inoperative, this result beingbrought about by the loosening of the index hand from' frequent and sudden contact with the pin. In our improved gage this difliculty is overcome by-..locating the stop or pin a well balanced affected by the a? upon the gage back in the path of the tail piece 0Z of the. crank D. 7 I

By this construction a gage movement is provided which is simple and strong, and wherein the moving parts are so light and that they 'are not injuriously vibration to mentis subjected in service.

now to Figs. 6, and 7, which which the instru- \Ve' claim :1 1. In a gage, the combination with an actuating member and an index hand, of

ted sleeve carried by said arbor, a crank fast on said sleeve, a slide-adjustably mounted on said crank, and a connection between said actuating member and said slide.

2. In a gage, the combination with an actuating member and an index hand, of an arbor having a cut away portion, a slotted sleeve carried by said arbor, a crank fast on said sleeve, a slide adjustably mounted on said crank, said crank having a slot registering with a hole in said slide and said slide having a slot registering with a hole in said crank, means to retain said slide in adjusted position, and a connection between said actuating member and said slide.

3. In a .gage, the combination with a an actuating member and an index hand, of an arbor having a cut away portion, a slotted sleeve carried'by said ar or, a crank fast on said sleeve and rovided with a tail piece, a stop in the pat ofsa-id tail piece, a slide adjustably mounted on said crank, said crank having a slot registering with a hole in said slide, and said; slide. having a slot registering with a hole in said crank, means to retain said slide in adjusted position, and aconnection between said actuating member and said slide.

Signed by usat Bridgeport, Connecticut, this 8th day of July 1910.

FREDERICK C. BLANCHARD.

ERNEST B. CROOKER. Witnesses:

W. R. CLARKE, WM. R. STROUD.

an arbor having a cut away portion, a slot- 

